Crystallization and surface segregation in CuIn 0.7 Ga 0.3 Se 2 thin films on Cu foils grown by pulsed laser deposition

Yeon Hwa Jo, Bhaskar Chandra Mohanty, Yong Soo Cho

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This work reports unexpected crystallization and segregation behavior of CuIn 0.7 Ga 0.3 Se 2 (CIGS) thin films deposited on flexible Cu foils by pulsed laser deposition. A composite-type microstructure containing nanometer-scaled CIGS crystallites embedded in amorphous Cu-rich matrix is observed even at the high temperature of 500 °C. The findings are attributed to very fast condensation of the ablated species and random nucleation induced from the amorphous matrix. Cu-rich particulates tend to precipitate on the film surface, and their average size, shape, number density and composition exhibit a strong dependence on the substrate temperature up to 500 °C. The similar crystallization properties of the films on Cu foils and glass substrates are noticeable to the use of Cu foils for flexible solar cells.

Original languageEnglish
Pages (from-to)6819-6823
Number of pages5
JournalApplied Surface Science
Volume256
Issue number22
DOIs
Publication statusPublished - 2010 Sep 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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